diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc32/dl-trampoline.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/dl-trampoline.S | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc32/dl-trampoline.S b/sysdeps/powerpc/powerpc32/dl-trampoline.S new file mode 100644 index 0000000000..6a158c3fff --- /dev/null +++ b/sysdeps/powerpc/powerpc32/dl-trampoline.S @@ -0,0 +1,186 @@ +/* PLT trampolines. PPC32 version. + Copyright (C) 2005, 2006 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA + 02110-1301 USA. */ + +#include <sysdep.h> + + .section ".text" + .align 2 + .globl _dl_runtime_resolve + .type _dl_runtime_resolve,@function +_dl_runtime_resolve: + cfi_startproc + # We need to save the registers used to pass parameters, and register 0, + # which is used by _mcount; the registers are saved in a stack frame. + stwu r1,-64(r1) + cfi_adjust_cfa_offset (64) + stw r0,12(r1) + stw r3,16(r1) + stw r4,20(r1) + # The code that calls this has put parameters for `fixup' in r12 and r11. + mr r3,r12 + stw r5,24(r1) + mr r4,r11 + stw r6,28(r1) + mflr r0 + # We also need to save some of the condition register fields + stw r7,32(r1) + # Don't clobber the caller's LRSAVE, it is needed by _mcount. + stw r0,48(r1) + cfi_offset (lr, -16) + stw r8,36(r1) + mfcr r0 + stw r9,40(r1) + stw r10,44(r1) + stw r0,8(r1) + bl _dl_fixup@local + # 'fixup' returns the address we want to branch to. + mtctr r3 + # Put the registers back... + lwz r0,48(r1) + lwz r10,44(r1) + lwz r9,40(r1) + mtlr r0 + lwz r8,36(r1) + lwz r0,8(r1) + lwz r7,32(r1) + lwz r6,28(r1) + mtcrf 0xFF,r0 + lwz r5,24(r1) + lwz r4,20(r1) + lwz r3,16(r1) + lwz r0,12(r1) + # ...unwind the stack frame, and jump to the PLT entry we updated. + addi r1,r1,64 + bctr + cfi_endproc + .size _dl_runtime_resolve,.-_dl_runtime_resolve + +#ifndef PROF + .align 2 + .globl _dl_prof_resolve + .type _dl_prof_resolve,@function +_dl_prof_resolve: + cfi_startproc + # We need to save the registers used to pass parameters, and register 0, + # which is used by _mcount; the registers are saved in a stack frame. + stwu r1,-320(r1) + cfi_adjust_cfa_offset (320) + /* Stack layout: + + +312 stackframe + +308 lr + +304 r1 + +288 v12 + +272 v11 + +256 v10 + +240 v9 + +224 v8 + +208 v7 + +192 v6 + +176 v5 + +160 v4 + +144 v3 + +128 v2 + +112 v1 + +104 fp8 + +96 fp7 + +88 fp6 + +80 fp5 + +72 fp4 + +64 fp3 + +56 fp2 + +48 fp1 + +44 r10 + +40 r9 + +36 r8 + +32 r7 + +28 r6 + +24 r5 + +20 r4 + +16 r3 + +12 r0 + +8 cr + r1 link + */ + stw r0,12(r1) + stw r3,16(r1) + stw r4,20(r1) + # The code that calls this has put parameters for `fixup' in r12 and r11. + mr r3,r12 + stw r5,24(r1) + mr r4,r11 + stw r6,28(r1) + mflr r5 + # We also need to save some of the condition register fields. + stw r7,32(r1) + # Don't clobber the caller's LRSAVE, it is needed by _mcount. + stw r5,308(r1) + cfi_offset (lr, -12) + stw r8,36(r1) + mfcr r0 + stw r9,40(r1) + stw r10,44(r1) + stw r0,8(r1) + # Save the floating point registers + stfd fp1,48(r1) + stfd fp2,56(r1) + stfd fp3,64(r1) + stfd fp4,72(r1) + stfd fp5,80(r1) + stfd fp6,88(r1) + stfd fp7,96(r1) + stfd fp8,104(r1) + # XXX TODO: store vmx registers + # Load the extra parameters. + addi r6,r1,16 + addi r7,r1,312 + li r0,-1 + stw r0,0(r7) + bl _dl_profile_fixup@local + # 'fixup' returns the address we want to branch to. + mtctr r3 + # Put the registers back... + lwz r0,308(r1) + lwz r10,44(r1) + lwz r9,40(r1) + mtlr r0 + lwz r8,36(r1) + lwz r0,8(r1) + lwz r7,32(r1) + lwz r6,28(r1) + mtcrf 0xFF,r0 + lwz r5,24(r1) + lwz r4,20(r1) + lwz r3,16(r1) + lwz r0,12(r1) + # Load the floating point registers. + lfd fp1,48(r1) + lfd fp2,56(r1) + lfd fp3,64(r1) + lfd fp4,72(r1) + lfd fp5,80(r1) + lfd fp6,88(r1) + lfd fp7,96(r1) + lfd fp8,104(r1) + # ...unwind the stack frame, and jump to the PLT entry we updated. + addi r1,r1,320 + bctr + cfi_endproc + .size _dl_prof_resolve,.-_dl_prof_resolve +#endif |